Authentication Project — Complete Multi-Strategy Auth Implementation

In this tutorial, you will learn about Authentication Project. We cover key concepts, practical examples, and best practices to help you master this topic.

This capstone project brings together all authentication patterns. You will build an authentication service that supports multiple authentication methods and allows users to choose their preferred login method.

What You'll Learn

You'll build a comprehensive authentication system combining JWT, OAuth 2.0, social login, API keys, MFA, and session management.

Why It Matters

Real-world applications support multiple auth methods. Users expect social login. Enterprise clients require SAML. APIs need API keys. Developers need all these working together.

Real-World Use

An identity platform like Auth0 or Keycloak supports dozens of authentication methods. You will build a simplified version of the same concept.

flowchart TD
    A[Client] --> B{Choose Login Method}
    B --> C[Username/Password + MFA]
    B --> D[Google Social Login]
    B --> E[GitHub Social Login]
    B --> F[API Key]
    C --> G[Issue JWT]
    D --> G
    E --> G
    F --> G
    G --> H[Protected API]

Project Requirements

Build an authentication service with:

• JWT access/refresh token auth
• OAuth 2.0 social login (Google, GitHub)
• API key authentication for services
• TOTP MFA enrollment and verification
• Session management with token revocation
• Auth middleware for protected routes
• Rate Limiting on login endpoints

Mini Project

Complete the full authentication service with all patterns. Deploy with Docker. Test each auth method with integration tests.

What's Next

Explore API Gateway Concepts to learn how gateways centralize cross-cutting concerns.